Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9393cad76a71d58…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 17:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b11988b921f2e0a0e0688ddee7c2f9c9 SHA-1: 55aeff4a72746ff3d9816b8aa33fcef75e48a094 SHA-256: e9393cad76a71d581db1c50e70213c89fbc1a921c20ea030abf33dd736516d03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan-like behavior. The document functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS upload storage. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://luluscafeonline.com/uploads/files/68837829692.pdf In PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3a208fea7---77289227551.pdfIn PDF document text
    • http://soupworld.de/upload/file/remifitewot.pdfIn PDF document text
    • http://fructusartis.com/i/File/47117208731.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/49882348829.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/86919132548.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/92279883189.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/e691d9756d99407dbe6d4d9f1ddc0191/tuzewamirebavilivadow.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/xutanovori.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/74053013495.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/84023481633.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077713928640---nekilomadabejezi.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/18928954388.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d49aebf19a---vazirixeneloxate.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/nudizilodogujitadav.pdfIn PDF document text
    • https://europartner2.pl/uploads/tigadeso.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ce1c539f1---37147550897.pdfIn PDF document text
    • https://carlojans.com/cms/file/gidabed.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/gc83dagi5o1al7nv7k6437pd85/xigakuvepebimukenip.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/abc2f6755f687366288b6ff0846a8e6c/vomusewufurituf.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/2a36011c4b5b34ae2801b2102e91db31/nasufufosemef.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/giwuzapezujemiboj.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0ka648vklv1ma170nhlhhrtp7/ninogowa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=gathering+information+definitionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 10624 bytes
SHA-256: 78208925daaf50625f1381bd6bcff4ff9ca5139d19086cbce79b03db1c4da532
font_02_sfnt_off000114f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 16624 bytes
SHA-256: 95b30b9c382abc6efc3e68e07e6cddc22a2d104381340f214d38b1bf6035f44c

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